diff --git a/src/mai.py b/src/mai.py
new file mode 100644
index 0000000..ee70a6e
--- /dev/null
+++ b/src/mai.py
@@ -0,0 +1,107 @@
+# lambda_function.py
+from boxoffice_api import BoxOffice 
+import pandas as pd
+import datetime as dt
+import json
+import s3fs
+import boto3
+from botocore.exceptions import ClientError
+
+def get_secret(secret_name):
+    """Retrieve secret from AWS Secrets Manager."""
+    session = boto3.session.Session()
+    client = session.client(
+        service_name='secretsmanager'
+    )
+    try:
+        get_secret_value_response = client.get_secret_value(
+            SecretId=secret_name
+        )
+    except ClientError as e:
+        raise e
+    else:
+        if 'SecretString' in get_secret_value_response:
+            return json.loads(get_secret_value_response['SecretString'])
+
+def get_previous_date(days: int = 2) -> str:
+    """Get the date for n days before today."""
+    return (dt.datetime.now() - dt.timedelta(days=days)).strftime('%Y-%m-%d')
+
+def retrieve_dataframe_cinema_check_it(date:str) -> pd.DataFrame:
+    """Retrieve cinema data and perform column checks."""
+    try:
+        # Get API key from Secrets Manager
+        secrets = get_secret('cinema_key')
+        api_key = secrets['cinema_key']
+        print('API key retrieved from Secrets Manager')
+    except Exception as e:
+        print(f'Error retrieving API key: {str(e)}')
+        raise
+    
+    try:
+        box_office = BoxOffice(api_key=api_key, outputformat="DF")
+    except Exception as e:
+        print(f'Cannot access box office: {str(e)}')
+        raise
+
+    test_df = box_office.get_daily(date=date)
+    print(test_df)
+
+    list_columns = ['TD', 'YD', 'Release', 'Daily', '%± YD', '%± LW', 'Theaters', 'Avg',
+        'To Date', 'Days', 'Distributor', 'Title', 'Year', 'Rated', 'Released',
+        'Runtime', 'Genre', 'Director', 'Writer', 'Actors', 'Plot', 'Language',
+        'Country', 'Awards', 'Poster', 'Ratings', 'Metascore', 'imdbRating',
+        'imdbVotes', 'imdbID', 'Type', 'DVD', 'BoxOffice', 'Production',
+        'Website', 'Response', 'Error', 'totalSeasons']
+
+    column_list = test_df.columns.tolist()
+
+    if list_columns == column_list:
+        print('columns corresponds')
+    else:
+        print('not corresponding')
+    
+    test_df.rename(columns={
+        '%± YD': 'ev_YD',
+        '%± LW': 'ev_LW',
+        'To Date': 'to_date'
+    }, inplace=True)
+
+    return test_df
+
+def save_to_s3(df: pd.DataFrame, s3_path: str) -> bool:
+    """Save DataFrame to S3 as CSV."""
+    try:
+        fs = s3fs.S3FileSystem()
+        with fs.open(s3_path, 'w') as f:
+            df.to_csv(f, index=False)
+        print(f'DataFrame successfully saved to {s3_path}')
+        return True
+    except Exception as e:
+        print(f"Error saving to S3: {str(e)}")
+        return False
+
+def lambda_handler(event,context):
+    """AWS Lambda handler function."""
+    try:
+        df = retrieve_dataframe_cinema_check_it(get_previous_date())
+        s3_path = f's3://cinemafreq/box_office_{get_previous_date()}.csv'
+        df['path'] = s3_path
+        df['timestamp'] = dt.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+        success = save_to_s3(df, f's3://cinemafreq/box_office_{get_previous_date()}.csv')
+        
+        if success:
+            return {
+                'statusCode': 200,
+                'body': json.dumps('Successfully processed cinema data')
+            }
+        else:
+            return {
+                'statusCode': 500,
+                'body': json.dumps('Failed to save data to S3')
+            }
+    except Exception as e:
+        return {
+            'statusCode': 500,
+            'body': json.dumps(f'Error: {str(e)}')
+        }
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